#!/bin/sh
#
# Copyright (C) 2022 The Falco Authors.
#
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
set -e

# Based off what debhelper dh_systemd_enable/13.3.4 would have added
# ref: https://www.debian.org/doc/manuals/debmake-doc/ch05.en.html#debhelper
# Currently running falco service uses the driver, so stop it before driver cleanup

case "$1" in
    remove|upgrade|deconfigure)
      echo "[PRE-REMOVE] Stop all Falco services:"
      systemctl --system stop 'falco-kmod.service' || true
      systemctl --system stop 'falco-bpf.service' || true
      systemctl --system stop 'falco-modern-bpf.service' || true
      systemctl --system stop 'falco-custom.service' || true
      systemctl --system stop 'falcoctl-artifact-follow.service' || true

      echo "[PRE-REMOVE] Call 'falco-driver-loader --clean:'"
      falco-driver-loader --clean
    ;;
esac
